Check valve for controlling pressure



,Dea 30, 1941. A. L. HoNsfE'rTER ErAl. 2,268,119

CHECK VALVE FOR CONTROLLING PRESSURE Filed Feb. 24, 1940 PJ .f w l /7 22 /8 f4 Ila [6 35 L 24 ..1 m 25 /53 [39' @y 5M Mw Patented Dee; 3o, 1941i.l

UNITED STATES APATEN'Il ol-Fica mmsgggmme Y *aan nommer mi James a. cole,

New York, N. Y. Application February zi, 194e, seria No.'szozz s om (ci. zal-144)' valve applied tothe entrance spud of a 'keg or th i invention relates to check valves and more particularly to check valves for controlling pressure iluid introduced into beer kegs or the like for forcing the beverage up from the keg and out through a dispensing tap or faucet. One object of the invention isv to provide an improved valve of` this kind which is so con- Fig. 1;

body member;

structed that it is easy to lap or polish the'valve p member and its seat while the parts are assembled, and to accomplish this operation easily by hand.

Other objects of the invention are to provide an improved valve of this kind which may be easily attached to the bung or entrance bushing or spud of a keg or the like, and with which this attachment may be easily eiected in a iluidtight manner.

Another object isto provide an economically manufactured valve member with associated valve stem.

Additional objects of the invention are to eii'ect simplicity and etllciencyin such valves and to provide an extremely simple valve of this kind which is easily cleaned and lapped and is economical, durable, and reliable in operation, and economical to manufacture and easy to install.

` Still other objects of the invention will appear asthe description proceeds; and while details 'of the invention are described in the specification many and various changes may be made without departing from the scope of the invention as claimed.

The inventive features for the accomplishment of these and other objects are shown herein in connection with an improved check valve which brieiiy stated, includes a valve-seat body member having an inlet nome at one end and a valvereceiving chamber at the other end, the chamber having a valve seat at the inner end of the chamber, and a guide plug secured in the chamber and having an air-e therethrough and a stem guide bore slidably receiving the stem of a valve member yieldably seated on the seat. Said stem and valve 'are secured fast together and are freely rotatable. the stem projecting from the plug a sumcient distance to be conveniently rotated between the thumb and flnger foi lapping the valve and seat after lapping material has been applied and the valve is yieldably seated.

In the accompanying drawing showing, by way of example, one of many possible embodiments of the invention:

Fig. 1 is a fragmental longitudinal vertical sectional view,

engaged in, partly in elevation, showing the check I iiii` e like; Flg.\2 is a section Fig. 3 isa. side Fig. 4 is a side elevation of the plug, valve member and spring detached from the body member;

Fig. 5 is a sectional view taken substantially on the line 5 5 of Fig. 4, looking in the direction of the arrows of said line, and showing the inner end of the plug in elevation; and

Fig. 6 is a longitudinal vertical sectional lview, showing the valve stem in elevation, and showing the stem secured to the valve disk with a molded or forced nt.

Thecheck valve comprises a valve-seat body member Il, II having a hose-receiving nozzle i0 at one end, a cylindrical valve-receiving bushing Il at the other end, and an intermediate angular wrench receiving portion I2 between the nozzle and bushing, said nozzle, bushing and portion being of brass or other suitable metal or material and preferably. butnot necessarily, all integral and coaxial. Said nozzle has anaxial bore I 4 therethrough and has annular hose-receiving and locking ribs l5k therearound adapted to receive a hose connected withv a pressure supply pump, storage cylinderorother source of air or gas under pressure.

The bushing Il has therein a cylindrical valve chamber I8 having an open outer end having interior slow threads l1 of slight pitch, said bushing having at the inner end a conical 'valve seat Il coaxial with and joining the inner end of said bore Il. Said chamber receives the inner end of a guide plug 2l having exteriorly threaded ends 2|', 22. an axial valve-stem guide bore 23 and one or more parallel air-passage bores 24, all passing through the plug.

The plug is provided with an annular rib 25 around its midpart providing inner and outer shoulders or faces 26 and 21; and when the inner threaded end 2| is engaged with the threads 4i'l of the outer end f the chamber, the inner shoulder 2l may engage the end face of the bushing Il with afluid-tight t made more effective by the slow pitch of the threads. The outer shoulder 21 is adapted to receive a gasket or washer 2l. whereby when the outer end 22 is threadedly instance. an entrance bushing container, keg or'the like, the

will form a duid-tight seal for or spud 2l in a gasket or washer taxen on the 'une 2 2 of elevation of `the check valveV I the connection between the shoulder 21 and the end face or th spud 23.

A conical Yvalve member or disk 30 of synthetic resin, plastic or other material yieldably seated on the seat I8 is provided with a central aperture 3| (Fig. 6) in which is received the roughened end of a valve stem 33 secured fast in said aperture by a. forced or molded nt or in other suitable manner, and slidable in said guide bore 23 and projecting through the plug, for a purpose to be explained By making the stem 33 and disk 30- of separate pieces, economy of material is eiected. A

AA helical compression spring 34 on said stem compressed between the plug and valve member holds the member yieldably on its seat, the plug being hollowed out ,to form' a large recess 35 at the inner face to accommodate a sufiicient length of spring without increasing unnecessarily the size of the chamber I6. When air or other gas under pressure 'is supplied through the hose and the bore I4, the valve is lifted from the seat and the gas under pressure passes through the passage bores into the'kcg or other container, thereby raising the pressure in the. keg sufficiently to:

force the liquid therein upwardly and out at a tap connected thereto, when the tap is opened. When this takes place, the stem 33 may move to the position of the dotted line 33' Fig. `1. Said spring 33 normally yieldably holds the valve member on its seat to prevent back-nw of gas fumes, beer or other liquid when the pump is not working or when the pump,v cylinder or other pressure supply is removed, or if for any other reason the pressure is low, thereby to prevent the hose, pump or other pressure means from becoming contaminated.

The steni 33 normally projects exteriorly from the plug a sufficient distance to be conveniently rotated between the thumb and linger, whereby when the valve assembly is removed, as by means of a wrench on the portion vI2 from the keg or other container, and a polishing or seat-lapping mixture is applied to the valve seat i8 and the conical face of the valve'member 30, the seat and face may be ground or lapped to remove any formation, deposit or irregularity that Vmay be caused by the fumes or contact of beer or the like on the valve'seat and member.

The invention claimed is:

1. In a check-valve air inlet for beer kegs,`

a valve-seatbody member comprising an inlet yand a valve-receiving chamber vhaving a. valve seat communicating with the inlet; a guide plug secured in the chamber and having an axial valve-stem guide bore, and long slenderair-passage bores passing through the plug; theinner end of the plug adjacent to the seat having a large deep recess nearly as large in diameter as the plug and about half as long as said chamber; a valve member engageable with the seat having a stem slidably in said guide bore; and a spring on said stem in said chamber and recess and compressed between the plug and valve member; said long slender air passages, serving, when the assembly is upright vand in use to check the rise of foam to the chamber; 'said chamber and recess serving the double function of providing a reservoir for rising liquid to prevent its reaching the valve, and to provide space for the spring, and shorten the bushing body.

2. In a check-valve air inlet for beer kegs, a valve-seat body member comprising an inlet and a valve-receiving chamber having interior threads and having a valve seat communicating with the inlet; a guide plug having an axial valvestcm guide bore and long slender parallel airpassage bores, al1 passing through the plug; the inner end of the plug having a large deep cir- V cular recess coaxial with the plug and nearly as large in diameter as the plug and more than skirt having threads throughout engaged with the threads of the chamber; a valve member yieldably seated on the seat having a stem slidably in said guide bore; and a spring in said chamber and recess and compressed between the plug and valve member. A

3. A check valve assembly comprising in combination, a valve-seat having therein a cylindrical valve chamber having at the inner end a valve seat, said chamber having interior threads of slow pitch extending from the outer end of the chamber to near the inner end; a guide plug having an exterioriy threaded inner end, an axial valve-Stem guide bore and long slender parallel passage air-passage bores, al1 passing through the plug; an annular rib around the plug flush A'with the cylindrical face of the bushing; the

inner end of the plug having a large deep circular recess coaxial with the plug and nearly as large in diameter as the plug and extending nearly to said rib and forming a skirt having threads engaged with the threads of the chamber.

ARI L. HONSTEITER. JAMES A. COLE. 

